Pixologic has added to the support software for ZBrush,
An integrated version of the ZBrush 3.1 documentation has been made available - the documents are indexed, linked, and fully searchable. Users of ZBrush can get the Documentation Installer here.
Meanwhile, the company has also brought back its ZClassroom, updated for ZBrush 31. The library of tutorials is designed to help users master the software and is updated regularly. The database of video tutorials can be found here.
For more info about ZBrush click here or read the software's online resource.